Merge pull request #4344 from Nuglif/fastcgi-backend-support

Add FastCGI backend support (#2982)

images/fastcgi-helloserver/Makefile

@@ -0,0 +1,105 @@
+all: all-container
+
+BUILDTAGS=
+
+# Use the 0.0 tag for testing, it shouldn't clobber any release builds
+TAG?=0.1
+REGISTRY?=kubernetes-ingress-controller
+GOOS?=linux
+DOCKER?=docker
+SED_I?=sed -i
+GOHOSTOS ?= $(shell go env GOHOSTOS)
+
+PKG=k8s.io/ingress-nginx/images/fastcgi-helloserver
+
+ifeq ($(GOHOSTOS),darwin)
+  SED_I=sed -i ''
+endif
+
+REPO_INFO=$(shell git config --get remote.origin.url)
+
+ARCH ?= $(shell go env GOARCH)
+GOARCH = ${ARCH}
+
+BASEIMAGE?=alpine:3.9
+
+ALL_ARCH = amd64 arm arm64 ppc64le
+
+QEMUVERSION=v3.0.0
+
+IMGNAME = fastcgi-helloserver
+IMAGE = $(REGISTRY)/$(IMGNAME)
+MULTI_ARCH_IMG = $(IMAGE)-$(ARCH)
+
+ifeq ($(ARCH),arm)
+    QEMUARCH=arm
+	GOARCH=arm
+endif
+ifeq ($(ARCH),arm64)
+        QEMUARCH=aarch64
+endif
+ifeq ($(ARCH),ppc64le)
+	QEMUARCH=ppc64le
+	GOARCH=ppc64le
+endif
+
+TEMP_DIR := $(shell mktemp -d)
+
+DOCKERFILE := $(TEMP_DIR)/rootfs/Dockerfile
+
+sub-container-%:
+	$(MAKE) ARCH=$* build container
+
+sub-push-%:
+	$(MAKE) ARCH=$* push
+
+all-container: $(addprefix sub-container-,$(ALL_ARCH))
+
+all-push: $(addprefix sub-push-,$(ALL_ARCH))
+
+container: .container-$(ARCH)
+.container-$(ARCH):
+	cp -r ./* $(TEMP_DIR)
+	$(SED_I) 's|BASEIMAGE|$(BASEIMAGE)|g' $(DOCKERFILE)
+	$(SED_I) "s|QEMUARCH|$(QEMUARCH)|g" $(DOCKERFILE)
+
+ifeq ($(ARCH),amd64)
+	# When building "normally" for amd64, remove the whole line, it has no part in the amd64 image
+	$(SED_I) "/CROSS_BUILD_/d" $(DOCKERFILE)
+else
+	# When cross-building, only the placeholder "CROSS_BUILD_" should be removed
+	# Register /usr/bin/qemu-ARCH-static as the handler for ARM binaries in the kernel
+	# $(DOCKER) run --rm --privileged multiarch/qemu-user-static:register --reset
+	curl -sSL https://github.com/multiarch/qemu-user-static/releases/download/$(QEMUVERSION)/x86_64_qemu-$(QEMUARCH)-static.tar.gz | tar -xz -C $(TEMP_DIR)/rootfs
+	$(SED_I) "s/CROSS_BUILD_//g" $(DOCKERFILE)
+endif
+
+	$(DOCKER) build -t $(MULTI_ARCH_IMG):$(TAG) $(TEMP_DIR)/rootfs
+
+ifeq ($(ARCH), amd64)
+	# This is for to maintain the backward compatibility
+	$(DOCKER) tag $(MULTI_ARCH_IMG):$(TAG) $(IMAGE):$(TAG)
+endif
+
+push: .push-$(ARCH)
+.push-$(ARCH):
+	$(DOCKER) push $(MULTI_ARCH_IMG):$(TAG)
+ifeq ($(ARCH), amd64)
+	$(DOCKER) push $(IMAGE):$(TAG)
+endif
+
+clean:
+	$(DOCKER) rmi -f $(MULTI_ARCH_IMG):$(TAG) || true
+
+build: clean
+	CGO_ENABLED=0 GOOS=${GOOS} GOARCH=${GOARCH} go build -a -installsuffix cgo \
+		-ldflags "-s -w" \
+		-o ${TEMP_DIR}/rootfs/fastcgi-helloserver ${PKG}/...
+
+release: all-container all-push
+	echo "done"
+
+.PHONY: register-qemu
+register-qemu:
+	# Register /usr/bin/qemu-ARCH-static as the handler for binaries in multiple platforms
+	$(DOCKER) run --rm --privileged multiarch/qemu-user-static:register --reset

images/fastcgi-helloserver/main.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"net/http/fcgi"
+)
+
+func hello(w http.ResponseWriter, r *http.Request) {
+	keys, ok := r.URL.Query()["name"]
+
+	if !ok || len(keys[0]) < 1 {
+		fmt.Fprintf(w, "Hello world!")
+		return
+	}
+
+	key := keys[0]
+	fmt.Fprintf(w, "Hello "+string(key)+"!")
+}
+
+func main() {
+	http.HandleFunc("/hello", hello)
+
+	l, err := net.Listen("tcp", "0.0.0.0:9000")
+	if err != nil {
+		panic(err)
+	}
+	fcgi.Serve(l, nil)
+}

images/fastcgi-helloserver/rootfs/Dockerfile

@@ -0,0 +1,21 @@
+# Copyright 2017 The Kubernetes Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+FROM BASEIMAGE
+
+CROSS_BUILD_COPY qemu-QEMUARCH-static /usr/bin/
+
+COPY . /
+
+CMD ["/fastcgi-helloserver"]